Submission

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Score: 40

User: exoworldgd

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2024-12-14 17:49:17

#include <iostream>
#include <vector>
using namespace std;
int main(void) {
    int n;
    cin >> n;
    if (n == 1) {
        cout << 0;
        return 0;
    }
    if (n == 2) {
        cout << 1;
        return 0;
    }
    vector<int> dp(n+2, 0);
    dp[1] = 0;
    dp[2] = 1;
    for (int i = 3; i <= n+1; i++) dp[i] = dp[i-1] + dp[i-2];
    cout << dp[n+1];
}